Stoker



Dec. 28 1926. l

R. A. FoREsMAN ET AL s ToKER Blw ATTORNEY Dec. 28 1926. 1,611,901

R. A. FORESMAN ET AL Y sToKER Filed July 5, 1922 2 sheets-sheet 2 wlTNl-:ssES: v lNvENToR e /I /11 f ATTORNEY Patented Dec. 28, i926.

UNTE Srttld iiidifC.

ROBERT A. FGBESIVIAN AND CHARLES TJ. GZ? MUORE, PENNYLVANTA, AS- SIGNORS TO WESTINGHOUSE ELECTRC AND Idrl'UFACT-RNG COlVIANY, A COR PORATION OF PENNSYLVANA.

STOKER.

Application .filed July 5. 1922. Serial No. 573,018.

This invention relates to mechanical unof kthe twyer boxes 20 and are so disposed dert'eed stokers and, has for an object to prothat la reciprocation off the t-wyer bank with vide a fuel distributing and agitating mechrelation to the retort sides ymay be cfliected. 55 anisin forstokers ot the character designated As illustrated in Figs. l to 5, a grid or which shall eiiect an even distribution, an apertured plate 25, of a size to substantially active agitation and a positive feeding inovecover the open top ot' the twyer box 20, is ment of the fuel throughout the entire fuel provided with a centrally depending,` rib 26 bed with greater uniformity, eti'ectiveness and a biiurcated yoke 27. rlhrough the 60 and economy in power consumption than lower ends of the yoke pass roos Q8 which 10 is at present attained in this type of stoker. entend through tlfxe iront -of the stoker and These and other objects are obtained by are associated with the drivin-.gv mechanism means of vapparatus embodying` the fieatures of the stoker in any suitable man-ner. of this invention herein described and illus- The grid 25 is provided with lugs 3l for 65 trated in the accompanying drawings in mountingl the twyer blocks 32 in proper which V spaced relation thereon, the upper twyer Fig. l is a view, partially in longitudinal vblock being `secured to the grid 25 by means section, through a retort and partially in of a bolt 33 `and serving to loc-k the -twyer longitudinal section through a Atwyer bank blocks yof the entire twyer bank in vposition 'l0 o'fa multiple retort undertood stoker, subon the grid 25. An -overhanginpg block 84 stantially as indicated by the line I- ot Secured to the air box 35 serves to prevent Fig. 2; Fig. 2 is a vi-ew in transverse section fuel from jamming between the upper Vend of the Stoker taken at .the line HMH of Of the twyer bank and the air boX Fig. l; Fig. 3 is aplan view of the vmovable For the purpose el' securingl a reciproca- 75 grid; Fig. 4l is a view in longitudinal sectionk 'l'OIl 0f the grid 25 and the twyer blocks -carof the 4grid illustrated in Fig; 3; 5 is ried thereby, stops l-O are secured -to the 4rods a fragmentary view showing Vthe mountingl 28 at a position -to move the grid to its upof a twyer 'block upon the grid; Fig?. 6 is a peifliiost position at the end of the ori-ter view partially in longitudinal sectionthrough SJC-mk@ 0f rods 28. Stops 4:1, disposed fm g@ a retort and partially in section through a Wld 'Ofllhe YOkGS 27, are preferably concengg twyey :bank A01;' mother type of Stoker to tric tubes surrounding` the rods 28 and se- W'hich this nvention may be applied; and cured thereto by threaded connect-ions 4-2 ar- Fig. 7 is a longitudinal section tlirough the Hinged to be readily accessible frei-n without central retort oi the stoker illustrated in the, fuma-CC: and mi@ adapted to Pemlt im S5 Fig. (i, rparts being broken away to show adllistllenl` 0f the NCiPTOCOD 0f the giifl :io operating mechanism. I'OlYi H0 il0vemeiit to its maximum'movc- Referring' to the drawings, in Figs. l and mentc '2 is 4shown a. multiple retort Stoker having Afm auxiliary Tam 45 is Provided in @H011 retorts n and twyel. Sections 12 A hopper retort. A drive connection lr6 is secured 90 13 arranged at the Ytoi-ward end of the fturt0 the mm 45 by NIGMS 0f bolts 47 and ei:-

49 nace Supplieg fue] to the ,mm boxes 14, tends through a slot .in the bottom plat-e 22. whence it is delivered into the retorts Yby Th@ CODHBCOU 4i; hug USllfillel extending the reciprocating rams l5. As is the @omarms 48 which at their extremities loosely mon practice, the rains are recilirocated by embrace the md5 2g Si@ U'ellel'fi' t9 021 95 vmeans `.of a lpower shaft 16, cranks 17 and the mds 28 @HQIHQG the 21T-'HIS 415i t() MUS@ il connecting rods 18, torward .and upward movement ot the rain The alternate l'tortg and twyepgectigng 4:5, Nid adjustable SOPS 0X1 lie lllS 28 maybe constructed in any suitable manner. are disposed to ei'ect any desired reciproca- As shown, twyer boxes 20 having` side walls tory movement ot the rams. l0@ 21 are disposed in spaced relation. Bottom At the rear of the movingl twyer bank may 59 plates 22 are supported upon lugs 23 probe stationary twyers 55, dead plates 56, cx-

jecting from the retort sides 2l. The twytension grates 57 and dump `grates 58, and ers are carried upon the open upper sides at thev forward end ot the retoris, vliuel derams lo to 'leed fuel into the retorts ll.

considerable thickness The tuel is directed by the deflector plates upwardly so as to i'orm a iuel bed of over the entire stoker. The rods 28 connected to the driving mechanism are also given a reciprocatory movement and this causes the grids and the twyer brocks 32 carried thereby, as well as Vthe auxiliary rams in the retorts ll,to reciprocate with respect to the retorts. The extent of reciprocation of the grids and auxiliary rams may be varied to produce any desired relative movement ot these elements f by adjustment of the stops 4l and 50. It

results that for any grade oit fuel, the proper agitation and rate of progression over the grate may be attained.

In Figs. 6 and i', this invention is shown as applied to a central retort stoker having lateral retorts of' the type described in the copending application of R. B. Mildon, Serial No. 420,015, and assigned to l/Vestinghouse Electric and Manufacturing Company. rI'his Stoker comprises a central retort and lateral grates consisting of alter nately arranged retorts 7l and twyer sec- Y tions 72. As shown, a twyer section includes a twyer box T3, a grid 74 mounted thereon and carrying twyer blocks T5. A retort is termed between the adjacent twyer boxes and includes a deflector 77, a bottom plate 78, supported upon side walls 79 ot the twyer boxes 73, and an auxiliary ram 80, in a man ner similar in all essential details to that described in relation to the apparatus illustrated in Figs. l to 4.

In the construction as shown in Fig. 6 the grid 74 and twyer sections 7 2 are slightly modified in order to better adapt them for use with the type oi stoker shown. In accordance with this modification the grid T4. has a depending lip 8l at its end nearest the dump grate arranged to slide over the upper side ot a supporting I beam 82 and the side ot the dump grate 86. The twyer sections 72 are arranged to span the grid 74 as in the previously described modification, but are held in place with respect to each other by means of depending lugs 83 each fitting into a recess ot' the next succeeding twyer section. The twyer section 72 nearest the central retort 70 is held in place on the grid by means of a bolt 85 as in the previously described modification.

A main ram 91 operates to feed fuel 'from the hopper 92 into the central retort T0 and the Yfuel distributed along` the retort 'TO bv means ot' pushers 98 operatively connected to the main rain by rod 94, Two oscillating rods 96 extend from the ront'to the rear of the stoker one on each side of the central retort 70, and are provided with crank arms 97 disposed centrally beneath each retort and twyer box. The grids 74 and the auxiliary rams 79 are provided with depending lugs 98 and 99, respectively, which are pivotally secured to the ends ot' the crank arms 5)? by means of links 100.

The operation ot the apparatus illustrated in Figs. 5 and 6 is not essentially dii'i'erent from that above described with respect to Figs. .l to 4. Fuel is 'ed into the central retort by ram 91 and distributed along the retort and over the sides thereof by means ot the pushers 9?. he Jfuel overflowing trom the main retort is agitated and moved toward the side walls of the furnaceA by means of the reciprocating twyer blocks and auxiliary rams. agitation and progressive movement of the fuel over the entire Stoker from the time the fuel enters the central retort until it is discharged upon the side dump grates.

While we have shown our invention in but two forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible or" various other' changes and modifications without departing from the spirit. thereof, and we desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specilically set forth in the appended claims.

What We claim is:

l. In an underfeed Stoker, spaced retorts, twyer blocks each spanning the space between adjacent retorts, and means for reciprocating the twyer blocks between any two retorts in unison with relation to the retorts.

2. In an undert'eed stoker, spaced retorts having side walls, twyer blocks each spanning the space between adjacent retorts and supported by the side walls, and means for reciprocating the twyer blocks between any two retorts in unison with relation to the retort side walls.

8. In an underfeed Stoker, two spaced retorts, an auxiliary ram in each retort, twyer blocks each spanning the space between the retorts, and means for reciprocating the auxiliary rams and twyer blocks with relation to the retorts.

4. In an underfeed stoker, having alternately disposed retorts and twyer boxes, a bank of twyer blocks supported by each twyer box, each block extending from side to side of the twyer box, and actuating means Jfor reciprocating each bank of twyer blocks with respect to the twyer box with which it is associated.

5. In an underfeed stoker having alternately disposed retorts and twyer boxes, a bank of twyer blocks supported by each There results a continuousv tivyer box, each block extending from side to side of the twyer box, an auxiliary rain in each retort, and actuating ineans for reciprocating each blank of tWyer blocks and each rain with respect to the twyer box.

6. In an underfeed Stoker having alternately disposed retorts and tvvyer boxes, an apertured plate covering each of said tvvyer boxes, a bank of tvvyer blocks carried by each of said plates, each block extending from side to side of the tWyer box, and ine-ans for reciprocating the plates and associated tWyer blocks With respect to the tivyer boxes.

7. In an underfeed stoker, spaced tWyer boxes having side Walls, twyer blocks carried by the side Walls of each tWyer box and extending from side to side thereof, and means for reciprocating the tWyer blocks with respect to said side Walls.

8. In an underfeed Stoker, spaced tWyer boxes having side Walls, retorts between adjacent tWyer boxes, the side Walls of the twyer boxes also constituting the side Walls of retorts, a bottom plate for the retort carried by said side Walls, an auxiliary rarn in each retort, twyer blocks carried by the side Walls of each tvvyer box and extending from side to side thereof, and ineans for reciproeating the auxiliary rams and twyer blocks with relation to said side Walls.

In testimony whereof, I have hereunto subscribed my naine this 27th day of June,

ROBERT A. FORESMAN. In testimony whereof, I have hereunto subscribed niy name this 20th day of June 1922.

CHARLES F. MILLER.

ERTir-FIGANE,V 0F CRREGTIN, Patent No. 1,611f901. i"

Granted Decembei 2%, 1926, ROBERT A. FORESMAN ET 's in the printed s nl requringcorrecton as follows: P for the word "blank read "banl"; and that the said Le read with this A the case in the the same may co Signed and se pefzillcm'iam @l llaa age 3, lime 4, claim tters Patent should nform to lll@ reward al Seal. 

